Thermostatic controlling device for hot-water-boiler heaters



Sept. 30, 1924. I 1,509,928

W. R. BREEDS 'rmamnosmnc CbNTROLLING nsvxca FOR HOT WATER BOILER HEATERSFiled Feb. 28. 1921 INVENTOR. W.R.Breeds.

' Britain, and a resident of the city of Tov Patented Sept. 30, 1924. I

WILLIA! nonnn r nnnnns, or rename, on'raaro, sauna.

'rnnnuosrarrc' con'rnoLLms DEVICE Ton. nonwarnn-noztnn Hmrnns.

a ucauonmed February 23, 1921. Serial 1%. 448,585.

To all whom it may mam.-

Be it known that I, WILLIAM Ronnn'r Bnnnns, a subject ,of the King ofGreat ronto, in thecounty of York, in the Province of Ontario, Canada,have invented certain new and useful Improvements in Therwhich:

mostatic Controlling Devices for Hot- Water-Boiler Heaters, of which thefollow-' ing is the specification.

My invention relates to improvements in thermostatic controlling devicesfor hot water boiler heaters and the-object ofthe invention is to devisea simple and effective mechanical controlling device which can bereadily applied to hot water boilers and which will control theoperationof the hot" water heater connected thereto. A further appliedto any part of the boiler depending on how much hot water is required.

My invention consists of a controlling device constructed and; arrangedall as hereinafter more particularly described and illustrated in theaccompanying drawing in Fig. 1 represents a side elevation of a'hotwater boiler showing my device applied thereto.

Fig. 2 is a vertical section through the device showing the mechanism insuch position that the gas passing through-the case ing thereof willhave access to the hot water heater.

Figure 3 is a vertical section through the section line 33, Figure 4,and'showi the different parts of the mechanism in suc position' that thegasentering the, casing of the controlling device is prevented frompassing to the hot water heater.

Fig. 4 is a section through the l ne 44 Fi re 2, and

ig. 5 is a top plan view of my device. 7 Like charactersof referenceIndicate. corresponding parts in the different views.

- ,1 is the hot water boiler. '2- is the casing of my controlling deviceprovided with the main gas inlet 3 and the gas outlet 4 suitablyconnected to the burner of the hot water heater 41. 5 is a cover platefor the casing 2 suitably secured thereto bythe screws 6.

7 is a hollow boss preferably of cylindrical shape formed at the to ofthe casing 2 on the side'nearest the boiler 1, the outer end of the bossbeing 0 en and suitably curved at 8 to conform th the convexity of;

boiler so that upon the boss bein applied thereto the outer edge thereofwill t snugly against the side of the boiler.

9 is a thermostatic capsule inserted into I the boss 7 and free therein,said thermostatic capsule being adapted to be secured against the sideof the boiler 1 by means of the straps 42.

The thermostatic capsule may be con- 'structed of any suitable designand the particular construction forms no part of the present invention.

10 is a bearing lug suitably formed on the interior of the top of thecasing 2. 11' isa lever pivoted at one end to the bearing lug v 10 bythe pin 12. 13 is a spindle extending through an orifice 14 in th'e,wallof the cas-' ing and into the boss 7, said spindle being suitablymounted on the leather diaphragm 15 which covers the orifice 14, theouter end of the spindle 13 being adapted to engage the thermostaticcapsule.

16 is a screw threaded through the lever 11 and adapted to en age a nut17 on the free end of the spindle 13, said nutbeing held in place by alock nut 18. 19 is an interiorly threaded hollow boss on the side ofthecasing '2 remote from-the boiler, said boss being closed b a threadedplug 20.

21 is a closed be low boss communicatin with the interior of the casingand forme on the same immediatel below the boss 7. '22 is a springconnecte at one end to the end of the hollow boss and at-the other endto the lever 11 intermediately of the length of the same; 23 areinwardly extending bearing lugs formed on the interior of the casing andadapted to receive the outwardly .extending trunnions 24 of the U-shapedtripping member25. y 26. is a s ring connected at one end to the freeend 0 the lever 11 and at the'other end to the trip ing member 25 in thevicinity of its free en such free end 27 being preferably constructed ofwedge shape. 28 is a valve operating beam freely mounted on the inward yextending bearing lugs 29 formed on the interior of the casing 2 by thetrunnions 30 which extendfreely into the same.

31 is a rectangular loop shaped frame formed on one end of the beam 28and ada ted to receive the wedge shaped end 27. of t e tripping member25. 32 are adjusting screws extending inwardly through the ends of theloop shaped member and adapted to engage The opposite end of the beam 28has the valve stem 33 pivotally connected thereto at one end, the freeend of such valve stem carrying the valve 34:, provided with a sealingpad 35 constructed of rubber, leather or other suitable material andadapted to seat on the seat 36 communicating with the gas outlet 1. 37is a post extending up through the side members of the beam 28 and 38 isa spring connected at one end to thepost37 and at the other end to theend of the beam 28 remote from the frame 31.

The operation of the device is as follows:

Assuming that the respective parts are in the closed position shown inFigure 3 the gas from the as main will pass from the pipe 39 throng theinlet 3 into the interior oi the casing but will be prevented frompassing out of the gas outlet 1 into the pipe 10 communicating with thegas jets in the hot water heater 4:1 by the valve 34 being closed. Whenthe temperature of the water in the boiler 1 falls to a prede-' terminedtemperature at the point where the boss 7 is applied thereto, thecapsule 9 will contract and consequently as the spring 22 holds thespindle 13 in engagement with .suchcapsule the lever 11 will be swungover from the position shown in Figure 3 to the position shown in Figure2. When this occurs the free end of the lever will pass the axis of thetrunnions of the tripping member 25 and being connected thereto by aspring 26 will trip the member, causing the wed e shaped end 27 toengage the left han screw 32 (Fig. 2) and thus swing over the beam 28into t e position shown in Figure 2 consequently lifting the pad 35 ofthe valve 34 off the seat 36 and thus permitting the gas to flow throughthe main pipe 39, gas mlet 3, from the casing, out of the as outlet 4.,through the pipe 40 .into the 3ets of the gas heater, it beingunderstood that a pilot ight is always provided in the gas heater tolight the gas when the jets are turned on."

Now when the water in the boiler reaches the desired temperature at thelevel where the boss 7 is applied thereto the thermostatic capsule 9will expand, thus moving the spindle 13 against the adjusting screw 16and causing the swinging of the lever 11 into the position shown in Fire 3. When this occurs, upon the free en of the lever passing the axisof the trunnions 2 1 the tripping member 25 will be tripped and thewedge shaped end 27 of such member will engage the other screw 32, thusswinging the beam 28 about its trunnions and causing the pad 35 of thevalve 34 to seat on the valve seat 36, consequently cutting [iii thesupply of gas to the heater.

By removin the pin 20 the adjusting screw 16 may e adjusted so as tocause the spindle 13 to swing over the lever 11 either woaeee sooner orlater as desired, thus providing an adjustment therefor by means ofwhich the thermostatic capsule 9 will actuate the tripping member at alower or higher temperature as desired irrespective of the position atwhich such capsule is placed on the boiler.

My device may be applied to the boiler at any desired level in orderthat either the whole water in the boiler may be heated or any requiredpart thereof. For instance, assuming that the boiler is of thirty galloncapacity it it is found that only ten gallons is usually used by thehousehold at one time, the device may be applied to such boiler at adistance of one-third from the top of the boiler and consequently onlythe top onethird of the water in the boiler will be heated prior to thegas being cut off from the water heater. Further, where it is desirableto vary the temperature required the adjusting screw 16 may be adjustedso that the device will trip earlier or later as the case may be.

It will also be seen by providing the inlet and outlet gas orifices asshown that the pipes 39 and 40 may be applied thereto from either sideof the casing or from op osite sides as the case may be. It frequentlyoccurs in pipmg, that this is desirable if there isnot room to connectthe pipes as shown in Figure 5, it being necessary to connect both pipesto the orifices from either one side or the other.

From the above description it will be apparent that I have devised asimple and eifective controlling device for heaters for hot waterboilers which will be automatic in operation and with which the desiredquantity of water in the boiler may be heated to the desiredtemperature, thus effecting an economy of gas that is impossible wherethe whole of the water in the boiler is heated.

No means is shown for holding the boss 7 in engagement with the boilerbut it is to be understood that this is preferably done by supportingthe casing on the gas pipes. If desired however, a strap can be usedsurrounding the boiler and secured to the boss 7.

My device also possesses the additional advantage that it will have asna action and consequently revent any back ring in the air chamber ofthe gas burner.

What I claim as my invention is:

1. In thermostatic controlling devices for hot water boiler heaters, thecombination with a gas inlet valve for the heater and a valve casing, ofa thermostatically actuated lever pivoted in the casing, a swin abletrigger journalled intermediately o the length of the casing, sprinconnecti means between thetrigger am the free c3 of the lever, anintermediately journalled beam in the casing having one end pivotallyconnected to the valve and the other end constituting a ring into whichthe trigger is inserted, and spring means for normally holding the valveseated.

2. In thermostatic controlling devices for hot water boiler heaters, thecombination with a gas inlet valve for the heater and a valve casing, ofa, thermostatically actuated lever pivoted inthe casing, a swingabletrig- 10 ger journalled intermediately of the length of the casing,spring connectingmeans benected to the valve and the other endconstituting a ring into which the trigger is inserted, opposedadjustable trigger engaging means on the rm and spring means fornormally holding t e valve seated.

WILLIAM ROBERT BREEDS.

